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Process for preparing polyurethane rubber ageing-proof coating

A polyurethane, anti-aging technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of rubber aging, the inability to prevent tire aging, and the anti-aging method cannot be used for tires or rubber products, etc. Achieving the effect of good photoaging performance and excellent ozone resistance

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Problems solved by technology

[0002] At present, the purpose of preparing polyurethane coating is to decorate rubber products to make it bright and solvent-resistant, and it does not prevent rubber from aging. The existing method to prevent the aging of tires is to paste newspapers on the tires or use other objects to cover the tires. When covered, it can only block ultraviolet light, but cannot prevent the aging effect of ozone and oxygen on tires
The traditional anti-aging method of adding anti-aging agent to the rubber compound cannot be used for in-use tires or rubber products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0006] Example: A process for preparing polyurethane rubber anti-aging coating, 200 grams of polyurethane rubber with a molecular weight of 500-15000 and 500 grams of polyurethane rubber with a molecular weight of 100000-1100000 was preheated at 50 ° C for 50 minutes , and then the preheated rubber was masticated with an open rubber mixer, masticated for 30 minutes, added 100 grams of chlorourethane, 100 grams of 2-hydroxy-4-methoxybenzophenone, and plasticized After refining for 150 minutes, use a calender to roll and press it into a film with a thickness of 20 cm. Put the rolled film into a mixer with 5000 grams of ethyl acetate and acetone in advance and stir for 30 hours. Add 100 grams of 80% trimeric isocyanate chlorobenzene solution to the polyurethane solution.

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Abstract

The invention provides a process for preparing polyurethane rubber anti-aging coating. 200g polyurethane rubber with molecular weight of 500-15000 and 500g polyurethane rubber with molecular weight of 100000-1100000 are preheated in 50 DEG C for 50 minutes, and then the preheated rubber is plasticated by an opened refine rubber machine for 30 minutes. 100g chloro-urethane and 100g 2-hydroxy-4-methoxy benzophenone are added and plasticated for 150 minutes, and then rolled by a calender to get films with thickness of 20 centimeters. The calendered films are added into a material stirring machine with 5000g ethyl acetate and acetone to be stirred for 30 hours, and then 100g chlorobenzene solution of 80 percent of triisocyanate is added into the stirred polyurethane solution. The invention has the following advantages of excellent ozone, oxygen and light-aging resistance performance, good painting performance, good physical and mechanical properties.

Description

technical field [0001] The invention is a process for preparing polyurethane rubber anti-aging coating. Background technique [0002] At present, the purpose of preparing polyurethane coating is to decorate rubber products to make it bright and solvent-resistant, and it does not prevent rubber from aging. The existing method to prevent the aging of tires is to paste newspapers on the tires or use other objects to cover the tires. When covered, it can only block ultraviolet light, but cannot prevent the aging effect of ozone and oxygen on tires. The traditional anti-aging method of adding anti-aging agent to the rubber compound cannot be used for in-use tires or rubber products. Contents of the invention [0003] The object of the present invention is to overcome above-mentioned defective, a kind of technology of preparing polyurethane rubber anti-aging coating is provided. [0004] The technical solution of the present invention is: a process for preparing polyurethane r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04
Inventor 张云波
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